can you help me how to make a drop and pick up gun script?

Hello drbanana2go! To pick up a tool: insert a Script in the tool and place this:

local debounce = false

function getPlayer(humanoid) 
local players = game.Players:children() 
for i = 1, #players do 
if players[i].Character.Humanoid == humanoid then return players[i] end 
end 
return nil 
end 

function onTouch(part) 

local human = part.Parent:findFirstChild("HumanoidRootPart") 
if (human ~= nil) and debounce == false then -- When the player touches the part, it will execute the following script.

debounce = true

local player = getPlayer(human) 

if (player == nil) then return end 

script.Parent:clone().Parent = player.Backpack --Copy the tool inside the Backpack

wait(2)
debounce = false
end
end


script.Parent.Parent.Touched:connect(onTouch) 

Also to drop a tool: click on backspace in your keyboard.

There is a property of the tool called CanBeDropped, set that to true and use backspace to drop. Whenever the tool is dropped, you simply touch it to pick it up.